ui/message_center/views/desktop_popup_alignment_delegate.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_MESSAGE_CENTER_VIEWS_DESKTOP_POPUP_ALIGNMENT_DELEGATE_H_
   6 #define UI_MESSAGE_CENTER_VIEWS_DESKTOP_POPUP_ALIGNMENT_DELEGATE_H_
   7
   8 #include "base/macros.h"
   9 #include "ui/gfx/display_observer.h"
  10 #include "ui/gfx/geometry/rect.h"
  11 #include "ui/message_center/views/popup_alignment_delegate.h"
  12
  13 namespace gfx {
  14 class Screen;
  15 }
  16
  17 namespace message_center {
  18 namespace test {
  19 class MessagePopupCollectionTest;
  20 }
  21
  22 // The PopupAlignmentDelegate for non-ash Windows/Linux desktop.
  23 class MESSAGE_CENTER_EXPORT DesktopPopupAlignmentDelegate
  24     : public PopupAlignmentDelegate,
  25       public gfx::DisplayObserver {
  26  public:
  27   DesktopPopupAlignmentDelegate();
  28   ~DesktopPopupAlignmentDelegate() override;
  29
  30   void StartObserving(gfx::Screen* screen);
  31
  32   // Overridden from PopupAlignmentDelegate:
  33   int GetToastOriginX(const gfx::Rect& toast_bounds) const override;
  34   int GetBaseLine() const override;
  35   int GetWorkAreaBottom() const override;
  36   bool IsTopDown() const override;
  37   bool IsFromLeft() const override;
  38   void RecomputeAlignment(const gfx::Display& display) override;
  39
  40  private:
  41   friend class test::MessagePopupCollectionTest;
  42
  43   enum PopupAlignment {
  44     POPUP_ALIGNMENT_TOP = 1 << 0,
  45     POPUP_ALIGNMENT_LEFT = 1 << 1,
  46     POPUP_ALIGNMENT_BOTTOM = 1 << 2,
  47     POPUP_ALIGNMENT_RIGHT = 1 << 3,
  48   };
  49
  50   // Overridden from gfx::DisplayObserver:
  51   void OnDisplayAdded(const gfx::Display& new_display) override;
  52   void OnDisplayRemoved(const gfx::Display& old_display) override;
  53   void OnDisplayMetricsChanged(const gfx::Display& display,
  54                                uint32_t metrics) override;
  55
  56   int32_t alignment_;
  57   int64_t display_id_;
  58   gfx::Screen* screen_;
  59   gfx::Rect work_area_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(DesktopPopupAlignmentDelegate);
  62 };
  63
  64 }  // namespace message_center
  65
  66 #endif  // UI_MESSAGE_CENTER_VIEWS_DESKTOP_POPUP_ALIGNMENT_DELEGATE_H_